What’s the consensus opinion on adding washers between the firewall and mount vs between the mount and engine to adjust for engine sag? On the RV-8 the firewall bolts are easy to get to vs the engine mount bolts.

I did the job with large washers on the firewall. I forget exactly, but easy to measure and calculate, 1/8 inch of washer moved the spinner back plate up about 1/4 inch? And yes a lot easier than the engine bolt location, as I recall mounting the engine.

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